Air flows with stagnation temperature t=300 k. the flow is isentropic through a converging duct with exit area a2=0.20 m2·the nozzle exits into the atmosplere where pb=100 kpa determine: (a) the minimum stagnation pressure for choked flow (b) the mass flow rate given the stagnation pressure found in parta (c) the exit mach if p 160 kpa (d) the mass flow rate given po= 160 kpa (e) the value of a/a* given the exit mach from part o (f) explain why a/a* is greater than 1

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10

Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.

Agas mixture consists of 8 kmol of h2 and 2 kmol of n2. determine the mass of each gas and the apparent gas constant of the mixture.